UTXO Stack structure framework: Nervos CKB team expanded a set of standardized BTC layer 2 construction scheme based on the RGB++ technology protocol, which is regarded as the most Native solution to integrate the BTC main chain expansion. Because the UTXO Stack structure inherits the simplicity and security of native BTC, it can be regarded as a relatively mainstream BTC layer 2 direction in the short term. Recent protocol upgrades to the RGB++ layer and the engineering implementation of the UTXO Swap provide the foundation for BTC ecosystem developers to expand the Bitcoin ecosystem based on the UTXO structure.

The UTXO Stack structure framework developed by Nervos CKB team offers a promising direction for BTC layer 2 solutions. With the simplicity and security inherited from BTC, it paves the way for expanding the Bitcoin ecosystem. The recent upgrades to the RGB++ protocol and UTXO Swap implementation provide a solid foundation for developers to innovate within the UTXO structure. Exciting times ahead for BTC ecosystem development!